<template>
	<div class="top-category">
		<div class="container">
			<XtxBread>
				<XtxBreadItem to="/">首页</XtxBreadItem>
				<transition name="fade-right" mode="out-in">
					<XtxBreadItem :key="topCategory.id">{{topCategory.name}}</XtxBreadItem>
				</transition>
			</XtxBread>
			<XtxCarousel :sliders="sliders" style="height:500px" />

			<div class="sub-list">
				<h3>全部分类</h3>
				<ul>
					<li v-for="item in topCategory.children" :key="item.id">
						<router-link :to="`/category/sub/${item.id}`">
							<img :src="item.picture">
							<p>{{item.name}}</p>
						</router-link>
					</li>
				</ul>
			</div>

			<div class="ref-goods" v-for="item in subList" :key="item.id">
				<div class="head">
					<h3>- {{item.name}} -</h3>
					<p class="tag">{{item.desc}}</p>
					<XtxMore :path="`/category/sub/${item.id}`"></XtxMore>
				</div>
				<div class="body">
					<GoodsItem :goods="g" v-for="g in item.goods" :key="g.id"></GoodsItem>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
	import {
		findBanner
	} from '@/api/home'
	import {
		ref,
		computed,
		watch
	} from 'vue'
	import {
		useStore
	} from 'vuex'
	import {
		useRoute
	} from 'vue-router'
	import GoodsItem from './components/goods-item'
	import {
		findTopCategory
	} from '@/api/category.js'

	export default {
		components: {
			GoodsItem
		},

		setup() {
			const sliders = ref([])
			findBanner().then(data => {
				sliders.value = data.result
			})

			const store = useStore()
			const route = useRoute()
			const topCategory = computed(() => {
				let cate = {}
				const item = store.state.category.list.find(item => {
					return item.id === route.params.id
				})
				if (item) {
					cate = item
				}
				return cate
			})

			const subList = ref([])
			const getSubList = () => {
				findTopCategory(route.params.id).then(data => {
					subList.value = data.result.children
				})
			}

			watch(() => route.params.id, newVal => {
				if(newVal && route.path === `/category/${newVal}`) {
					getSubList()
				}
			}, {
				immediate: true
			})

			return {
				sliders,
				topCategory,
				subList
			}
		}
	}
</script>

<style lang="less" scoped>
	.top-category {
		h3 {
			font-size: 28px;
			color: #666;
			font-weight: normal;
			text-align: center;
			line-height: 100px;
		}

		.sub-list {
			margin-top: 20px;
			background-color: #fff;

			ul {
				display: flex;
				padding: 0 32px;
				flex-wrap: wrap;

				li {
					width: 168px;
					height: 160px;

					a {
						text-align: center;
						display: block;
						font-size: 16px;

						img {
							width: 100px;
							height: 100px;
						}

						p {
							line-height: 40px;
						}

						&:hover {
							color: @xtxColor;
						}
					}
				}
			}
		}

		.ref-goods {
			background-color: #fff;
			margin-top: 20px;
			position: relative;

			.head {
				.xtx-more {
					position: absolute;
					top: 20px;
					right: 20px;
				}

				.tag {
					text-align: center;
					color: #999;
					font-size: 20px;
					position: relative;
					top: -20px;
				}
			}

			.body {
				display: flex;
				justify-content: flex-start;
				flex-wrap: wrap;
				padding: 0 65px 30px;
			}
		}
	}
</style>
